萘是碳、氫兩種元素組成的化合物，不是元素。 其次，它是致癌物，致淋巴瘤、致子宮腫瘤、致肺腫瘤。 另外還具有刺激作用，高濃度致溶血性貧血及肝、腎損害。

Naphthalene is a compound composed of carbon and hydrogen, not an element. Secondly, it is a carcinogen, causing lymphoma, uterine tumor and lung tumor. In addition, it also has stimulating effect, and high concentration can cause hemolytic anemia and liver and kidney damage.

反復(fù)接觸萘蒸氣，可引起頭痛、乏力、惡心、嘔吐和血液系統(tǒng)損害?？梢鸢變?nèi)障、視神經(jīng)炎和視網(wǎng)膜病變。皮膚接觸可引起皮炎。 毒性：屬低毒類(lèi)。

Repeated exposure to naphthalene vapor can cause headache, fatigue, nausea, vomiting and blood system damage. It can cause cataract, optic neuritis and retinopathy. Skin contact can cause dermatitis. Toxicity: low toxicity.

吸入高濃度萘蒸氣或粉塵時(shí)，出現(xiàn)眼及呼吸道刺激、角膜混濁、頭痛、惡心、嘔吐、食欲減退、腰痛、尿頻、尿中出現(xiàn)蛋白及紅白細(xì)胞。亦可發(fā)生視神經(jīng)炎和視網(wǎng)膜炎。

When inhaling high concentration naphthalene vapor or dust, there will be eye and respiratory tract irritation, corneal turbidity, headache, nausea, vomiting, anorexia, low back pain, frequent urination, protein and red and white blood cells in urine. Optic neuritis and retinitis can also occur.

工業(yè)萘是基礎(chǔ)化工原料，主要用于生產(chǎn)減水劑、擴(kuò)散劑，是生產(chǎn)合成樹(shù)脂、增塑劑、橡膠防老劑，表面活性劑，合成纖維，染料、醫(yī)藥和香料等的原料。

Industrial naphthalene is a basic chemical raw material, which is mainly used in the production of water reducer and dispersant. It is the raw material for the production of synthetic resin, plasticizer, rubber antioxidant, surfactant, synthetic fiber, dyes, medicine and spices.

根據(jù)純度不同，萘可分為工業(yè)萘和精萘，工業(yè)萘進(jìn)一步提純脫除雜質(zhì)及脫硫后，可得到高純度的精萘，且從煤焦油中分離出來(lái)的萘稱(chēng)之為焦油萘。

According to different purity, naphthalene can be divided into industrial naphthalene and refined naphthalene. After further purification, impurity removal and desulfurization of industrial naphthalene, high-purity refined naphthalene can be obtained, and naphthalene separated from coal tar is called tar naphthalene.

萘的用途分配，各國(guó)有所不同，大致用于生產(chǎn)鄰苯二甲酸酐約占70%，染料中間體（如β－萘酚）和橡膠加工助劑約占15%,殺蟲(chóng)劑約占6%,鞣革劑約占4%，染料生產(chǎn)較少的國(guó)家,如美國(guó)則用于生產(chǎn)殺蟲(chóng)劑的比例較大。

The use distribution of naphthalene varies from country to country. It is roughly used to produce phthalic anhydride, accounting for about 70%, and dye intermediates (such as β－ Naphthol) and rubber processing aids account for about 15%, pesticides account for about 6%, tanning agents account for about 4%. Countries with less dye production, such as the United States, have a large proportion of pesticides.

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